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Finding the Fourth Proportional to 20,957.46, 28,921.31 and 11,526.03

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Solution

The fourth proportional to 20,957.46, 28,921.31 and 11,526.03 is: 15,905.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.46 : 28,921.31 = 11,526.03 : x
  2. Step 2: Convert to fraction form
    20,957.46/28,921.31 = 11,526.03/x
  3. Step 3: Cross multiply
    20,957.46x = 28,921.31 × 11,526.03
  4. Step 4: Simplify right side
    20,957.46x = 333,347,886.70
  5. Step 5: Solve for x
    x = 333,347,886.70/20,957.46
  6. Step 6: Final answer
    x = 15,905.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.